Fix some links.

Author: ehuss

.github/workflows/main.yml

@@ -17,7 +17,7 @@ jobs:
     - name: Install mdbook
       run: |
         mkdir bin
-        curl -sSL https://github.com/rust-lang/mdBook/releases/download/v0.3.5/mdbook-v0.3.5-x86_64-unknown-linux-gnu.tar.gz | tar -xz --directory=bin
+        curl -sSL https://github.com/rust-lang/mdBook/releases/download/v0.4.7/mdbook-v0.4.7-x86_64-unknown-linux-gnu.tar.gz | tar -xz --directory=bin
         echo "$(pwd)/bin" >> $GITHUB_PATH
     - name: Report versions
       run: |

book.toml

@@ -8,89 +8,89 @@ title = "The Edition Guide"
 git-repository-url = "https://github.com/rust-lang/edition-guide"
 
 [output.html.redirect]
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-"/rust-2018/module-system/index.html" = "/rust-2018/path-changes.html"
-"/rust-2018/module-system/raw-identifiers.html" = "/rust-2018/path-changes.html"
-"/rust-2018/module-system/path-clarity.html" = "/rust-2018/path-changes.html"
-"/rust-2018/module-system/more-visibility-modifiers.html" = "/rust-2018/path-changes.html"
-"/rust-2018/module-system/nested-imports-with-use.html" = "/rust-2018/path-changes.html"
-"/rust-2018/error-handling-and-panics/index.html" = "/rust-2018/index.html"
-"/rust-2018/error-handling-and-panics/the-question-mark-operator-for-easier-error-handling.html" = "/rust-2018/index.html"
-"/rust-2018/error-handling-and-panics/question-mark-in-main-and-tests.html" = "/rust-2018/index.html"
-"/rust-2018/error-handling-and-panics/controlling-panics-with-std-panic.html" = "/rust-2018/index.html"
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-"/rust-next/literal-macro-matcher.html" = "/rust-2021/index.html"
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-"/rust-next/alloc.html" = "/rust-2021/index.html"
-"/rust-next/maybe-uninit.html" = "/rust-2021/index.html"
-"/rust-next/cargo-vendor.html" = "/rust-2021/index.html"
+"/rust-2018/edition-changes.html" = "index.html"
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src/rust-2018/new-keywords.md

@@ -4,7 +4,7 @@
 
 ## Summary
 
-- [`dyn`] is a [strict keyword][strict], in 2015 it is a [weak keyword].
+- `dyn` is a [strict keyword][strict], in 2015 it is a [weak keyword].
 - `async` and `await` are [strict keywords][strict].
 - `try` is a [reserved keyword].
 
@@ -50,11 +50,13 @@ is sometimes slower, and often cannot be used at all when its alternatives can.
 
 Furthermore, with `impl Trait` arriving, "`impl Trait` vs `dyn Trait`" is much
 more symmetric, and therefore a bit nicer, than "`impl Trait` vs `Trait`".
-`impl Trait` is explained [here](impl-trait-for-returning-complex-types-with-ease.md).
+`impl Trait` is explained [here][impl-trait].
 
 In the new edition, you should therefore prefer `dyn Trait` to just `Trait`
 where you need a trait object.
 
+[impl-trait]: ../../rust-by-example/trait/impl_trait.html
+
 ### `async` and `await`
 
 These keywords are reserved to implement the async-await feature of Rust, which was ultimately [released to stable in 1.39.0](https://blog.rust-lang.org/2019/11/07/Async-await-stable.html).

src/rust-2018/path-changes.md

@@ -99,19 +99,39 @@ Some examples of needing to explicitly import sysroot crates are:
 * [`test`]: This is only available on the [nightly channel], and is usually
   only used for the unstable benchmark support.
 
-[`alloc`]: ../../../alloc/index.html
-[`core`]: ../../../core/index.html
-[`proc_macro`]: ../../../proc_macro/index.html
-[`std`]: ../../../std/index.html
-[`test`]: ../../../test/index.html
-[nightly channel]: ../../../book/appendix-07-nightly-rust.html
+[`alloc`]: ../../alloc/index.html
+[`core`]: ../../core/index.html
+[`proc_macro`]: ../../proc_macro/index.html
+[`std`]: ../../std/index.html
+[`test`]: ../../test/index.html
+[nightly channel]: ../../book/appendix-07-nightly-rust.html
 [no_core]: https://github.com/rust-lang/rust/issues/29639
-[no_std]: ../../../reference/names/preludes.html#the-no_std-attribute
+[no_std]: ../../reference/names/preludes.html#the-no_std-attribute
 
 #### Macros
 
 One other use for `extern crate` was to import macros; that's no longer needed.
-Check [the macro section](../macros/macro-changes.md) for more.
+Macros may be imported with `use` like any other item. For example, the
+following use of `extern crate`:
+
+```rust,ignore
+#[macro_use]
+extern crate bar;
+
+fn main() {
+    baz!();
+}
+```
+
+Can be changed to something like the following:
+
+```rust,ignore
+use bar::baz;
+
+fn main() {
+    baz!();
+}
+```
 
 #### Renaming crates